Pump



ll 25 l5' PUMP L. E. RUSSELL Filed July 22, 1954 Nov. 10, 1959 BYE United States Patent PUMP Linus E. Russell, Springfield, Ohio, assignor to Peters & Russell, Inc., Springfield, Ohio, a corporation of Ohio Application July 22, 1954, Serial No. 444,953

9 Claims. (Cl. 2311-229) This invention relates to pumps, and more particularly to apper type check valves as used in pumps and like devices.

The object of the invention is to simplify the construction as well as the means and mode of operation of pumps, whereby such pumps may not only be economically manufactured, but will be more eicient and satisfactory in use, adaptable to a wide variety of applications and be unlikely to get out of repair.

A further object of the invention is to provide a pump so constructed and arranged as to function for either or both inflation and deflation at the will of the operator.

A further object of the invention is tov provide in such a pump, a plurality of idential valve means enabling selective operation of the pump to effect inflation or deflation, said valve means being interchangeable.

A further object of the invention is to present a liapper type check valve of one piece unitary construction made v of a relatively soft and flexible material, the valve being constructed in an improved manner facilitating its selective use as both an inflation or deilation valve in a combination pump unit.

Another object of the invention is to present a generally new check valve mechanism especially suited for use in a combination inflation and deflation pump.

A further object of the invention is to present a check valve mechanism, in a pump or like device, unusual in the simplicity of its construction and in the ease of assembly and disassembly which it affords.

A further object of the invention is to provide a pump possessing the advantageous structural features, the .inherent meritorious characteristics and the mode of operation herein mentioned.

With the above primary and other incidental objects in View as will more fully appear in the specification, the invention intended to be protected by Letters Patent consists of the features of construction, the parts and combinations thereof, and the mode of operation as lhereinafter described or illustrated in the accompanying drawings, or their equivalents.

Referring to the accompanying drawing, wherein is shown one, but obviously not necessarily the only form of embodiment of the invention.

Fig. l is a view in side elevation of a combination inflation and deflation pump embodying check Valve mechanisms in accordance with the illustrated form of the invention;

Fig. 2 is a fragmentary View in longitudinal section of the upper end of the pump, as seen in Fig. l;

Fig. 3 is a View similar to Fig. 2 of the lower end of the pump, as seen in Fig. l, being taken substantially along the line 3-3 of Fig. 5 and with cylinder, cage and bolt elements added;

Fig. 4 is a fragmentary View in cross section taken substantially along the line 4-4 of Fig. 3;

Fig. 5 is a fragmentary sectional view taken along the line 5-5 of Fig. 3 looking downwardly on the lower end cap assembly of the pump of Fig. 1;

tion with the valve seat,

ice

Fig. 6 is a view like Fig. 4, taken substantially along the line 6 6 of Fig. 2.

Like parts are indicated by similar characters of reference throughout the several views.

Referring to the drawings, a combination inflation and deliation pump in accordance with the disclosed embodiment of the invention comprises a cylinder 10 which at its opposite ends mounts end .plates 11 and 12. The plate 11 has a recess 13 receiving one end of the cylinder 10 and the plate 12 has a recess 14 receiving the other end of the cylinder. The peripheries of the plates 11 and 12 have circumferentially spaced apart enlargements 15 and 16, between which extend tie rods 17 and it will be understood that the assembly comprising cylinder 10 and end plates 11 and 12 may be tightened into a unitary assembly through appropriate adjutment of the rods 17 and that such structure may be returned to its component parts, or disassembled, by other appropriate adjustment of the rods 17.

The upper end plate 11 has a central boss 18 providing a bearing for a piston rod 19, one end of which extends into the cylinder it? and is suitably connected therein to a piston (not shown) reciprocable in the cylinder. Also on the end plate 11 is a laterally offset boss 21 having an open interior and communicating with the inside of the cylinder 10 through an opening 22 in the plate 11. The boss 21 may be suitably formed, as for example with external screw threads, for connection with a hose line leading to an article to be deflated.

The Vend plate 12V is formed with a central boss 23 opening to the inside of the cylinder 10 and'suitably formed, as with external screw threads, for connection with a hose line leading to an article for ination.

In underlying spaced apart relation to the end plate 11 is a thin metal stamping 24 which may be termed a cage. The cage 24 is cup shaped, having an upturned peripheral portion which lies flush against the wall of cylinder 10 and terminates in a ange 25 interposed between the upper end of the cylinder 10 and the. bottom of recess 13 in plate 11. The cage 24 is in eifect clamped between the plate 11 and cylinder 10. The cage 24 has a central opening for passage of the piston rod 19 therethrough and has another opening 26 communicating the inside of the cylinder 10 with the space between the cage 24 and the end plate 11.

The opposite end of the pump is provided with a similar cage 27 having a ange 2S clamped between the bottom of the cylinder 10 and the end plate 12. The cage 27 has an opening 29 communicating the inside of the cylinder 10 with the space between the cage 27 and the plate 12.

The opening 22 in the end plate l1 is formed with a beaded edge 31 defining a valve seat facing the cage 24. The cage 27 is crimped in the peripheral region of the opening Z9 therein to define a valve seat 32 facing the plate 12. Controlling ow through the openings 22 and 29 are respective check Valves 33 o-f identical construction. The valves are of the flapper type, having a one piece unitary construction and being made of a relatively soft liexible material, for example rubber. They comprise essentially a relatively thin and flat body portion 34, approximately disc shaped to cover the respective opening 22 or 29. The body portion 34 is connected by a neck 35 of reduced width but in the same plane to a base portion 36 provided with through openings 37. The base portion 36 of the Valve is thick in relation to the body portion 34, being provided with a relatively thin pad 38 on one side of the plane of the portion 34 and with a relatively thick pad 39 on the other side of the plane of the body 34. The pad 38 is provided merely to place the body portion 34 substantially in aligned rela- The pa d 39is` provided as an offset portion which permits the check valve to be confined between the cylinder end plate and its associated cage without, however, interfering with ilexure of the body portion 34 or neck 35.

The end plate 11 is `formed with integral projecting studs 41 projecting toward the cage The end plate 12 is formed with similar studs 42 projecting toward the cage 27, and with at least one additional stud 43 also projecting toward the plate 27 and receiveable in a recess 44 therein. The studs 41 on the plate 11 and the studs 42 on the plate 12 are provided for entry into .the openings 37 in the check valve 33 and preclude a swinging motion of the valve out of registry with the opening 22 or 29 controlled thereby. The cup formation of the cages 24 and 27 is predetermined to place the respective cages in confining relation to the check valves 33 whereby to prevent them from dropping off of the studs 41 and 42. The above mentioned stud 43 on plate 12 locates the cage 27 in a rotative sense, insuring that the valve 33 which is installed on the plate 12 will be in position to control flow through the opening 29 which is in the cage 27.

It will be understood that the check valves 33 are removably and revcrsibly installed in the respective ends of the pump. The valves are simply pressed into place upon the respective studs 41 and 42 and held thereon by the respective cage members 24 and 27. Further, in the case of the upper end plate 11 the check valve is installed on the studs 41 with the offset enlarged base orpad 39 facing the cage 24. This in effect spaces the body portion 34 of the valve from the cage 24 and holds it in superposcd contacting relation to the seat 31. In the case of the opposite end of Vthe pump cylinder the check valve is installed on the studs 42 with the offset pad 39 facing the plate 12. This holds thebody portion 34 of `the valve in superposed contacting relation to the valve seat 32.

It will further be understood that opening and closing movements of the valves are a function of pressure differences on the opposite sides thereof, as result from reciprocation of the rod 19 and the piston (not shown) thereon.

From the above description it will be apparent that there is thus provided a device of the character described possessing the particular features of advantage before enumerated as desirable, but which obviously is susceptible of modification in its form, proportions, detail construction and arrangement of parts without departing from the principle involved or sacrificing any of its advantages.

While in order to comply with the statute the invention has been described in language more or less specific as to structural features, it is to be understood that the invention is not limited to the specific features shown, but that the means and construction herein disclosed comprise but one of several modes of putting the invention into effect, and the invention is therefore claimed in any of its forms or modificationswithin the legitimate and valid scope of the appended claims.

Having thus described my invention, l claim:

l. In a pump or like device, a. cylinder, an end plate on said cylinder, `a cage in said cylinder in parallel spaced apart relation to said plate, each of said plate and cage having an opening therein, one of said openings being formed with a peripheral valve seat facing into the space between said plate and cage, stud means extending between said plate and said cage, a flexible flapper type check valve installed on said stud means and extending into contacting superposed relation to said valve seat and means for holding said cage to said cylinder, the spacing between said cage and said end plate being predetermined so that said valve is held by said cage and endplate in place on said stud means.

2. In a pump'or like device, a cylinder, first and second plate-like elements fixed in said cylinder with at least the central portion in axially spaced adjacent relation, each of said plates having an opening therethrough in said spaced portions, a valve seat on one of said elements in surrounding relation to one of said openings and facing into the space between said elements, a flexible blade-like flapper type check valve disposed between said plates in generally parallel relation thereto in normally superposed contacting relation to said valve seat, said valve having a base portion at its periphery which has a greater depth than said blade-like flapper portion, said plate-like elements being in relatively confining relation to said base portion while permitting flexing of the blade-like flapper portion of the valve relatively to said valve seat.

3. A pump or like device according to claim 2, characterized by stud means in one of said plate-like elements for anchoring said check valve, the base of said valve having openings receiving said stud means.

4. In a pump or like device, a cylinder having an end closure plate, said plate having a valve opening, means on said plate forming a valve seat about the opening and projecting inwardly of said cylinder, a disc-like element fixed to said cylinder in overlying closely spaced relation to said end closure plate, stud means projecting inwardly from said plate in adjacent relation to the valve opening and substantially to said disc-like element, a exible flapper valve having an integrally connected base, said valve base being freely seated to said stud means, and confined by said disc-like element against displacement, the valve flapper portion normally overlying the valve opening, in seated relation to the valve seat, and in axially spaced relation to said overlying disc-like element.

5. In a pump or like device, a cylinder having an end closure plate, said plate having a valve opening, means on said plate `forming a valve seat about the opening and projecting inwardly of said cylinder, a cage element fixed to said cylinder in overlying closely spaced relation to said end closure plate, a flexible flapper valve having an integrally connected base contained between said end plate and cage, the flapper portion of said valve being of lesser thickness than the base portion and extending .therefrom in a plane to normally over-lie the valve opening in substantially and uniformly spaced relation to said cage.

6. In a pump or like device, a cylinder having an end closure plate, a cage fixed to said cylinder in parallel spaced relation to said end closure plate, said plate having means for connecting a hose or the like thereto about an opening therein, an opening in said cage, means projecting from said cage about said cage opening and towards said end plate to provide a valve seat, a flexible flappertype valve normally overlying said valve seat in spaced relation to the relatively overlying end plate, the base extremity of said valve being relatively thicker than the tlapper portion to project beyond either face thereof, said base extremity being confined by abutment with said cage and said end plate, the end plate defining a limit for the flapper valve thereby.

7. A pump or like device according to claim 6, characterized by interengaging stud and recess means in said plate and said cage locating said cage relatively to said end plate in a rotative sense.

8. A pump unit capable of being selectively used for inflation or deflation including, a cylinder, end closure caps fixed'to said cylinder, cage elements fixed to seat within the respective ends of said cylinder to provide a disc-like element in substantially parallel spaced relation to each end closure, each of said disc-like elements and each of said end caps having an opening therein, one part of each pair of parts comprising an end cap and an adjacent disc-like element having means about the opening therein providing a valve seat projected towards the respective adjacent part, each of said check valves having a thick block-like base portion and an integrally con- 5 nected apper portion of blade-like configuration, one of said valves being disposed between the end cap and the disc-like element at each end of said cylinder and contained thereby to normally establish a flapper portion to the valve seat in spaced parallel relation to the conlining end cap and disc-like element.

9. The structure as set forth in claim 8 wherein said respective apper portion projects laterally of said respective base portion of each of said valves in a plane substantially parallel to the containing end cap `and disclike element and closer to the surface providing the associated valve seat.

UNITED STATES PATENTS OCrowley July 24, Brandenberger et al Aug. 15, Nelson Apr.- 8, Rutkowski May 13, Gray May 11, Gibson May 29,

FOREIGN PATENTS Great Britain July 28, France Oct. 29, 

